Declension table of ?atisāṃvatsara

Masculine	Singular	Dual	Plural
Nominative	atisāṃvatsaraḥ	atisāṃvatsarau	atisāṃvatsarāḥ
Vocative	atisāṃvatsara	atisāṃvatsarau	atisāṃvatsarāḥ
Accusative	atisāṃvatsaram	atisāṃvatsarau	atisāṃvatsarān
Instrumental	atisāṃvatsareṇa	atisāṃvatsarābhyām	atisāṃvatsaraiḥ atisāṃvatsarebhiḥ
Dative	atisāṃvatsarāya	atisāṃvatsarābhyām	atisāṃvatsarebhyaḥ
Ablative	atisāṃvatsarāt	atisāṃvatsarābhyām	atisāṃvatsarebhyaḥ
Genitive	atisāṃvatsarasya	atisāṃvatsarayoḥ	atisāṃvatsarāṇām
Locative	atisāṃvatsare	atisāṃvatsarayoḥ	atisāṃvatsareṣu

Compound atisāṃvatsara -

Adverb -atisāṃvatsaram -atisāṃvatsarāt